Spade
Mini Shell
3
\�K�@s�dZddlmZmZddlmZmZddlZddlZddl Z d)Z
d*Zdd�Zedd d
ddg�Z
d
e
_e jd+kr�de
j_de
j_de
j_de
j_Gdd�de�ZGdd�ded�ZGdd�de�ZGdd�de�Zeed�r�Gdd�de�Zeed
��rGd!d"�d"e�Zeed#��r"Gd$d%�d%e�Zeed&��r>Gd'd(�d(e�Zd(e�k�rPeZn:d"e�k�rbeZn(d%e�k�rteZnde�k�r�eZneZdS),z|Selectors
module.
This module allows high-level and efficient I/O multiplexing, built upon
the
`select` module primitives.
�)�ABCMeta�abstractmethod)�
namedtuple�MappingN�c
Csft|t�r|}n<yt|j��}Wn*tttfk
rJtdj|��d�YnX|dkrbtdj|���|S)z�Return a
file descriptor from a file object.
Parameters:
fileobj -- file object or file descriptor
Returns:
corresponding file descriptor
Raises:
ValueError if the object is invalid
zInvalid file object: {!r}NrzInvalid file descriptor: {})�
isinstance�int�fileno�AttributeError� TypeError�
ValueError�format)�fileobj�fd�r�!/usr/lib64/python3.6/selectors.py�_fileobj_to_fds
r�SelectorKeyrr�events�dataz�SelectorKey(fileobj,
fd, events, data)
Object used to associate a file object to its backing
file descriptor, selected event mask, and attached data.
��zFile object registered.zUnderlying file descriptor.z3Events that
must be waited for on this file object.zzOptional opaque data associated to
this file object.
For example, this could be used to store a per-client session
ID.c@s0eZdZdZdd�Zdd�Zdd�Zdd �Zd
S)�_SelectorMappingz)Mapping of file objects to selector keys.cCs
||_dS)N)� _selector)�selfZselectorrrr�__init__>sz_SelectorMapping.__init__cCst|jj�S)N)�lenr�
_fd_to_key)rrrr�__len__Asz_SelectorMapping.__len__cCsBy|jj|�}|jj|Stk
r<tdj|��d�YnXdS)Nz{!r} is not
registered)r�_fileobj_lookupr�KeyErrorr
)rrrrrr�__getitem__Ds
z_SelectorMapping.__getitem__cCst|jj�S)N)�iterrr)rrrr�__iter__Ksz_SelectorMapping.__iter__N)�__name__�
__module__�__qualname__�__doc__rrr!r#rrrrr;s
rc@sneZdZdZeddd��Zedd��Zddd�Zedd d
��Zdd�Z d
d�Z
edd��Zdd�Zdd�Z
dS)�BaseSelectora-Selector abstract
base class.
A selector supports registering file objects to be monitored for
specific
I/O events.
A file object is a file descriptor or any object with a `fileno()`
method.
An arbitrary object can be attached to the file object, which can be
used
for example to store context information, a callback, etc.
A selector can use various implementations (select(), poll(),
epoll()...)
depending on the platform. The default `Selector` class uses the most
efficient implementation on the current platform.
NcCst�dS)a3Register a file object.
Parameters:
fileobj -- file object or file descriptor
events -- events to monitor (bitwise mask of
EVENT_READ|EVENT_WRITE)
data -- attached data
Returns:
SelectorKey instance
Raises:
ValueError if events is invalid
KeyError if fileobj is already registered
OSError if fileobj is closed or otherwise is unacceptable to
the underlying system call (if a system call is made)
Note:
OSError may or may not be raised
N)�NotImplementedError)rrrrrrr�register^szBaseSelector.registercCst�dS)ajUnregister
a file object.
Parameters:
fileobj -- file object or file descriptor
Returns:
SelectorKey instance
Raises:
KeyError if fileobj is not registered
Note:
If fileobj is registered but has since been closed this does
*not* raise OSError (even if the wrapped syscall does)
N)r))rrrrr�
unregisteruszBaseSelector.unregistercCs|j|�|j|||�S)ayChange
a registered file object monitored events or attached data.
Parameters:
fileobj -- file object or file descriptor
events -- events to monitor (bitwise mask of
EVENT_READ|EVENT_WRITE)
data -- attached data
Returns:
SelectorKey instance
Raises:
Anything that unregister() or register() raises
)r+r*)rrrrrrr�modify�s
zBaseSelector.modifycCst�dS)aqPerform the actual selection,
until some monitored file objects are
ready or a timeout expires.
Parameters:
timeout -- if timeout > 0, this specifies the maximum wait time,
in
seconds
if timeout <= 0, the select() call won't block,
and will
report the currently ready file objects
if timeout is None, select() will block until a
monitored
file object becomes ready
Returns:
list of (key, events) for ready file objects
`events` is a bitwise mask of EVENT_READ|EVENT_WRITE
N)r))r�timeoutrrr�select�szBaseSelector.selectcCsdS)zmClose
the selector.
This must be called to make sure that any underlying resource is
freed.
Nr)rrrr�close�szBaseSelector.closecCsJ|j�}|dkrtd��y||Stk
rDtdj|��d�YnXdS)zzReturn the key associated to a
registered file object.
Returns:
SelectorKey for this file object
NzSelector is closedz{!r} is not
registered)�get_map�RuntimeErrorr
r
)rr�mappingrrr�get_key�szBaseSelector.get_keycCst�dS)z2Return
a mapping of file objects to selector
keys.N)r))rrrrr0�szBaseSelector.get_mapcCs|S)Nr)rrrr� __enter__�szBaseSelector.__enter__cGs|j�dS)N)r/)r�argsrrr�__exit__�szBaseSelector.__exit__)N)N)N)r$r%r&r'rr*r+r,r.r/r3r0r4r6rrrrr(Os
r()� metaclassc@sTeZdZdZdd�Zdd�Zddd�Zd d
�Zddd�Zd
d�Z dd�Z
dd�ZdS)�_BaseSelectorImplzBase selector
implementation.cCsi|_t|�|_dS)N)rr�_map)rrrrr�sz_BaseSelectorImpl.__init__cCsHyt|�Stk
rBx"|jj�D]}|j|kr$|jSq$W�YnXdS)alReturn a file
descriptor from a file object.
This wraps _fileobj_to_fd() to do an exhaustive search in case
the object is invalid but we still have it in our map. This
is used by unregister() so we can unregister an object that
was previously registered even if it is closed. It is also
used by _SelectorMapping.
N)rrr�valuesrr)rr�keyrrrr�s
z!_BaseSelectorImpl._fileobj_lookupNcCsd|s|ttB@r"tdj|���t||j|�||�}|j|jkrTtdj||j���||j|j<|S)NzInvalid
events: {!r}z"{!r} (FD {}) is already registered) �
EVENT_READ�EVENT_WRITErr
rrrrr
)rrrrr;rrrr*�sz_BaseSelectorImpl.registercCs@y|jj|j|��}Wn$tk
r:tdj|��d�YnX|S)Nz{!r} is not registered)r�poprr
r
)rrr;rrrr+�s
z_BaseSelectorImpl.unregistercCs�y|j|j|�}Wn$tk
r8tdj|��d�YnX||jkr^|j|�|j|||�}n"||jkr�|j|d�}||j|j <|S)Nz{!r}
is not registered)r)
rrr r
rr+r*r�_replacer)rrrrr;rrrr,�s
z_BaseSelectorImpl.modifycCs|jj�d|_dS)N)r�clearr9)rrrrr/s
z_BaseSelectorImpl.closecCs|jS)N)r9)rrrrr0sz_BaseSelectorImpl.get_mapcCs$y
|j|Stk
rdSXdS)z�Return the key associated to a given file descriptor.
Parameters:
fd -- file descriptor
Returns:
corresponding key, or None if not found
N)rr )rrrrr�_key_from_fds
z_BaseSelectorImpl._key_from_fd)N)N)r$r%r&r'rrr*r+r,r/r0rArrrrr8�s
r8cs`eZdZdZ�fdd�Zd�fdd� Z�fdd�Zejd krHdd
d�Z ne
j
Z ddd
�Z
�ZS)�SelectSelectorzSelect-based
selector.cst�j�t�|_t�|_dS)N)�superr�set�_readers�_writers)r)� __class__rrr%s
zSelectSelector.__init__Ncs@t�j|||�}|t@r&|jj|j�|t@r<|jj|j�|S)N)rCr*r<rE�addrr=rF)rrrrr;)rGrrr**szSelectSelector.registercs,t�j|�}|jj|j�|jj|j�|S)N)rCr+rE�discardrrF)rrr;)rGrrr+2szSelectSelector.unregisterZwin32cCs$tj||||�\}}}|||gfS)N)r.)r�r�w�_r-�xrrr�_select9szSelectSelector._selectc
Cs�|dkrdnt|d�}g}y|j|j|jg|�\}}}Wntk
rL|SXt|�}t|�}xV||BD]J}d}||kr�|tO}||kr�|tO}|j|�}|rh|j |||j
@f�qhW|S)Nr)�maxrNrErF�InterruptedErrorrDr<r=rA�appendr) rr-�readyrJrKrLrrr;rrrr.?s$
zSelectSelector.select)N)N)N)r$r%r&r'rr*r+�sys�platformrNr.�
__classcell__rr)rGrrB"s
rB�pollcsDeZdZdZ�fdd�Zd�fdd� Z�fdd�Zdd d
�Z�ZS)
�PollSelectorzPoll-based
selector.cst�j�tj�|_dS)N)rCrr.rV�_poll)r)rGrrrZs
zPollSelector.__init__NcsLt�j|||�}d}|t@r&|tjO}|t@r8|tjO}|jj|j|�|S)Nr) rCr*r<r.�POLLINr=�POLLOUTrXr)rrrrr;�poll_events)rGrrr*^s
zPollSelector.registercst�j|�}|jj|j�|S)N)rCr+rXr)rrr;)rGrrr+hszPollSelector.unregisterc
Cs�|dkrd}n|dkrd}ntj|d�}g}y|jj|�}Wntk
rR|SXx^|D]V\}}d}|tj@rz|tO}|tj@r�|t O}|j
|�}|rZ|j|||j@f�qZW|S)Nrg@�@)
�math�ceilrXrVrPr.rYr=rZr<rArQr)rr-rR�
fd_event_listr�eventrr;rrrr.ms(
zPollSelector.select)N)N) r$r%r&r'rr*r+r.rUrr)rGrrWWs
rW�epollcsXeZdZdZ�fdd�Zdd�Zd�fdd� Z�fd d
�Zddd�Z�fd
d�Z �Z
S)�
EpollSelectorzEpoll-based
selector.cst�j�tj�|_dS)N)rCrr.r`�_epoll)r)rGrrr�s
zEpollSelector.__init__cCs
|jj�S)N)rbr )rrrrr �szEpollSelector.filenoNcstt�j|||�}d}|t@r&|tjO}|t@r8|tjO}y|jj|j|�Wn"t k
rnt�j
|��YnX|S)Nr)rCr*r<r.�EPOLLINr=�EPOLLOUTrbr�
BaseExceptionr+)rrrrr;Zepoll_events)rGrrr*�s
zEpollSelector.registercs8t�j|�}y|jj|j�Wntk
r2YnX|S)N)rCr+rbr�OSError)rrr;)rGrrr+�szEpollSelector.unregisterc
Cs�|dkrd}n
|dkrd}ntj|d�d}tt|j�d�}g}y|jj||�}Wntk
rh|SXx^|D]V\}}d}|tj @r�|t
O}|tj@r�|tO}|j
|�}|rp|j|||j@f�qpW|S)Nrrg@�@g����MbP?���)r\r]rOrrrbrVrPr.rcr=rdr<rArQr) rr-�max_evrRr^rr_rr;rrrr.�s*
zEpollSelector.selectcs|jj�t�j�dS)N)rbr/rC)r)rGrrr/�s
zEpollSelector.close)N)N)r$r%r&r'rr r*r+r.r/rUrr)rGrra�s
ra�devpollcsXeZdZdZ�fdd�Zdd�Zd�fdd� Z�fd d
�Zddd�Z�fd
d�Z �Z
S)�DevpollSelectorzSolaris /dev/poll
selector.cst�j�tj�|_dS)N)rCrr.ri�_devpoll)r)rGrrr�s
zDevpollSelector.__init__cCs
|jj�S)N)rkr )rrrrr �szDevpollSelector.filenoNcsLt�j|||�}d}|t@r&|tjO}|t@r8|tjO}|jj|j|�|S)Nr) rCr*r<r.rYr=rZrkr)rrrrr;r[)rGrrr*�s
zDevpollSelector.registercst�j|�}|jj|j�|S)N)rCr+rkr)rrr;)rGrrr+�szDevpollSelector.unregisterc
Cs�|dkrd}n|dkrd}ntj|d�}g}y|jj|�}Wntk
rR|SXx^|D]V\}}d}|tj@rz|tO}|tj@r�|t O}|j
|�}|rZ|j|||j@f�qZW|S)Nrg@�@)
r\r]rkrVrPr.rYr=rZr<rArQr)rr-rRr^rr_rr;rrrr.�s(
zDevpollSelector.selectcs|jj�t�j�dS)N)rkr/rC)r)rGrrr/s
zDevpollSelector.close)N)N)r$r%r&r'rr r*r+r.r/rUrr)rGrrj�s
rj�kqueuecsXeZdZdZ�fdd�Zdd�Zd�fdd� Z�fd d
�Zddd�Z�fd
d�Z �Z
S)�KqueueSelectorzKqueue-based
selector.cst�j�tj�|_dS)N)rCrr.rl�_kqueue)r)rGrrrs
zKqueueSelector.__init__cCs
|jj�S)N)rnr )rrrrr szKqueueSelector.filenoNcs�t�j|||�}y`|t@r@tj|jtjtj�}|jj |gdd�|t
@rntj|jtjtj�}|jj |gdd�Wn"tk
r�t�j
|��YnX|S)Nr)rCr*r<r.�keventr�KQ_FILTER_READZ KQ_EV_ADDrn�controlr=�KQ_FILTER_WRITErer+)rrrrr;�kev)rGrrr*szKqueueSelector.registercs�t�j|�}|jt@rVtj|jtjtj�}y|j j
|gdd�Wntk
rTYnX|jt@r�tj|jtj
tj�}y|j j
|gdd�Wntk
r�YnX|S)Nr)rCr+rr<r.rorrpZKQ_EV_DELETErnrqrfr=rr)rrr;rs)rGrrr+'s
zKqueueSelector.unregisterc
Cs�|dkrdnt|d�}t|j�}g}y|jjd||�}Wntk
rL|SXxb|D]Z}|j}|j}d}|tj krz|t
O}|tjkr�|tO}|j
|�} | rT|j| || j@f�qTW|S)Nr)rOrrrnrqrPZident�filterr.rpr<rrr=rArQr)
rr-rhrRZkev_listrsr�flagrr;rrrr.<s&
zKqueueSelector.selectcs|jj�t�j�dS)N)rnr/rC)r)rGrrr/Rs
zKqueueSelector.close)N)N)r$r%r&r'rr r*r+r.r/rUrr)rGrrm
s
rmr�)rr)r'�abcrr�collectionsrrr\r.rSr<r=rr�version_inforrrrrr(r8rB�hasattrrWrarjrm�globalsZDefaultSelectorrrrr�<module>sH
~U3
1G8M